Do I need hood pins to install this?

Yes. Hood pins are required to secure the carbon fiber hood and prevent it from lifting at speed. Plan to source and install a quality pin kit designed for your vehicle's hood latch and hinge locations.

Will the carbon weave show through the clear coat, or is it painted solid?

The 2x2 twill weave is visible through the protective clear coat finish. If you prefer a painted finish, sand and prep the surface before applying your chosen paint system.

How much lighter is this than the original hood?

Carbon fiber is significantly lighter than OEM steel, which reduces front-end weight and improves handling balance. For precise weight comparison, reference your vehicle's service manual for OEM hood specifications.